Conclusions And Future Scope Engineering Essay

Conclusions And Future Scope Engineering Essay In the integrated circuit industry, the ceaseless effort to decrease critical transistor dimensions in each new technology guarantees that the prominence of electrostatic discharge will continue to grow. Devising ways to protect electronic devices against ESD is just as important as determining how to process and manufacture them because a product with susceptibility to damage will not be accepted. As a result of increasing susceptibility of devices to ESD because of miniaturization, the problem of ESD is now being dealt by most IC manufacturers and electronic system designers at several levels, from designing on-chip protection circuits to off chip protection design for systems. Once an IC is packaged and shipped to a customer, however, the in-built, on-chip protection circuit is the only means of defense against ESD damage. At the system level, the on-chip protection may not be sufficient to handle the system level ESD exposure. So off-chip or on-board protection devices are necess ary to protect the system from real world ESD. While circuit designers have successfully created robust ESD protection for past technologies, a lack of understanding of effects of ESD on various devices, circuits and systems; the mechanisms underlying ESD damage makes the susceptibility of electronic components to ESD still a hot topic of research. Mathematical analysis and estimation to calculate the induced transient voltages in shielded and unshielded cables is presented. This enables us to find the induced voltage and its rise time appearing at the terminals of the electrical equipment which are connected to such cables. This enables the designers to design protection circuits at the front-end of the equipment. The effect of ESD on logic gates, analog circuits, digital circuits, microcontrollers and complex electronics are presented. This chapter presents the contributions of this thesis toward implementing a methodology of characterization of the effects of indirect and direct ESD on various electronic components. Also the implementation of the board design and protection circuits on a custom designed microcontroller board based on an understanding of the ESD failure mechanisms of various devices and circuits is presented. This chapter covers the future scope on the research work carried out on ESD. The following results and conclusions have been arrived upon. 8.1 Overall Conclusions Mathematical equations have been developed and are implemented in MATLAB by which the coupled and induced voltages in unshielded and shielded cables can be calculated. The values of the induced voltages obtained agree with the published results by different authors. For contact discharge ESD, higher induced voltages are observed upto 10 MHz for CSD, upto 2.5 MHz for air discharge and in the 20 to 100 MHz range for all the three terminations resistive, RC shunt and CMOS device. The induced voltages are higher in the case of contact discharge compared to air discharge or CSD. The induced voltage in an unshielded cable increases with the decrease in the rise time and distance, and increase in the peak amplitude and the damping factor for the CSD current model. The peak value of the induced voltage due to IEC contact discharge ESD at 8 kV for resistive termination is 625V and 7.8 mV for RC shunt termination. The peak value of the induced voltage due to IEC air discharge ESD at 16 kV is 6.25 V and 3.25 mV for RC shunt termination. The peak value of the induced voltage at the input of a CMOS device is 14 V for contact discharge and 0.6 V for air discharge. It can be inferred that RC shunt terminations are preferred compared to the resistive or CMOS device termination as the induced voltages are in mV range. In case of shielded cable, a generic program in Visual C++ to compute the induced voltages for varying parameters of the current waveform, length, height of the cable and angle of incidence has been implemented. This can also be used to calculate induced voltages for different cable configurations. Using MATLAB, the data imported from Visual C++ is used to calculate induced voltages. The equations developed give the voltages induced whose values are in close agreement with those published by other authors. The induced voltages are investigated for braided and unbraided shielded cables. The induced voltage and current in the center conductor is larger for a braided cable compared to a non-braided cable. This analysis estimates the transient voltages appearing at the input of the system connected to the shielded cable. This estimate can be used to develop appropriate mitigation techniques to protect the sensitive system that is connected to the shielded cable. It has been calculated by simulation that in shielded cables, the voltages induced due to radiated ESD is negligible thereby reinforcing the theory that shielded cables can protect equipment from high frequency radiated fields due to ESD. The effect of variation of the parameters such the cable length, height of the cable above the ground plane and the angle of incidence of the ESD pulse has been discussed. The peak amplitude of the cable sheath current decreases correspondingly with decrease in the length of the cable. This change in the occurrence of the peak is due to smaller value of inductance in case of shorter cables as compared to long cables. The peak amplitude of the cable sheath current correspondingly decreases with increase in the height of the cable. The sheath current decreases with the increase in angle of incidence, as the induced current is function of cos  Ã‚ ±i. The induced voltage in turn depends upon sheath current and surface transfer impedance of the cable. The induced voltages for a shielded cable of length 1m, height 0.1m and angle of incidence 30o are 1.4-10-8V for braided and 6.6-10-16V for non braided cable as presented in Table 3.3. Mathematical analysis is used to model the response of Very High Frequency amplifier to ESD generated radiated EM fields. Using MATLAB the effect of the radiated fields on the induced voltages in a VHF amplifier for various distances from the ESD source is calculated. It is observed that a greater part of the energy due to ESD simulation currents has frequency components in the range of 200 to 400 MHz extending to the VHF and UHF bands. So the VHF amplifier is susceptible to ESD events in this frequency range. If the distance between the ESD generator and the pickup antenna is decreased, the peak magnitude of the voltage coupled to the amplifier input terminals increases. The amplitude of the fields at antenna terminals, open circuit voltage at antenna input terminals, voltage at the input and output of the amplifier decreases sharply with increase in distance from ESD source. It has been observed that the induced voltages at the amplifier input terminals can be as high as 7.446 V with a rise time of approximately 1 ns for a distance of 0.5 m between the ESD generator and the pickup antenna as given in Table 4.1. This can cause malfunction of the electronic circuitry inside the amplifier. The spice circuit modeling with transient analysis concurs with the experimental results for air discharge on analog circuits. The zero crossing detector built with an opamp is more susceptible to ESD when compared to the RC phase shift oscillator built with discrete components. It is experimentally verified and the modeling also revealed that the oscillator circuit using discrete components took some time to come back to its initial working condition after the ESD discharge due to the slow discharge of the charges accumulated. In the indirect discharge it is seen that the ESD effect depends on both distance and discharge voltage. Higher discharge voltage and shorter distances produce larger transients and distortions in analog circuits. Direct air discharge of 15kV at the ZCD input damaged the opamp but the oscillator recovered after 750 µs. Direct air discharge of 15kV at oscillator output affects the output of oscillator for 1.4ms. The ZCD output remains high till the sine wave output of oscillator circuit recovers. The spice modeling also give the same results for discharge at oscillator output. In the radiative coupling the transient appearing on the ZCD output could be due to differential mode and the common mode could not be investigated. In the direct air discharge conducted at the input point of the ZCD circuit, there could be two types of coupling the direct capacitor coupling to circuit and near field coupling for the common mode. In this case also the common mode was not investigated, so the transients shown are only differential mode. In the direct air discharge at oscillator output, the differential mode and common mode transients were seen. But the voltage probes and current probes of high voltage and low rise time of 1ns range with an accuracy of less than 5% were not available. Hence the initial rise time and the maximum amplitude of the transient could not be measured experimentally with good accuracy. The digital switching circuit without decoupling capacitors at Vcc malfunctioned when an ESD event occurred at a distance of 35 cm from the circuit. The transient affected only the data stream and the circuit stopped functioning. Post discharge analysis revealed that Binary counter IC SN74LS393N had failed functionally (all output pins were malfunctioning). The importance of adding decoupling capacitors to the supply point of each of the ICs is verified. Experiments carried out to study the response of data to ESD in a digital switching circuit with decoupling capacitors at Vcc reveal that the effect of ESD on the data and clock depends on the position of trigger and also the plane of coupling. During discharge onto the horizontal coupling plane (HCP), the instance of occurrence of the discharge (when Data and Clock are High or Low) played an important role on the effect of ESD on the output data stream. When both data and clock are High, increase in data amplitude or data inversion occurs and also there is increase in the amplitude of clock. The distance at which the pulse is discharged onto the HCP reflects on the amplitude of the transient. During discharge onto the vertical coupling plane (VCP) there is a loss of data and transient with more than 50V peak amplitude is introduced. The discharge to VCP affected the digital data more than the discharge to HCP. Experiments are also carried out by varying the values of decoupling capacitors in the digital switching circuit and it is observed that smaller the value of decoupling capacitor, the more susceptible the circuit becomes to ESD. The decoupling capacitor with higher value of capacitance (0.47 µF) offered better immunity to ESD in our digital circuit because of its ability to pass only lower frequencies thereby rejecting the high frequency ESD transients. Experimental investigations of the TTL and CMOS logic gates reveal that CMOS devices are more susceptible to ESD than TTL devices due to the presence of a dielectric media in CMOS devices which can easily breakdown at high voltages. The output of CMOS logic gates deteriorated after ESD stress and did not recover after reset. It is verified experimentally that the susceptibility of a circuit to ESD in the mixed mode circuit can be greatly reduced by properly grounding it. In the mixed mode circuit used, the data is affected more by transients of various voltages based on the discharge voltage given when the analog and digital grounds are common. This reiterates the fact, when the analog and digital grounds are common the high frequency return paths from the digital ground (astable multivibrator circuit using 555 Timer) reach the analog ground (inverting amplifier using opamp) and affect the output. In the mixed mode circuit used when the analog and digital grounds are separated there are no transients due to ESD in the analog output. Hence separate analog and digital grounds are recommended. Direct air discharge of 12 kV twice on the GPIO pin of the custom designed 8 bit microcontroller diagnostic circuit resulted in the impedance of the board becoming very low implying there is a dead short between the VDD and the VSS rails of the microcontroller. The microcontroller shut itself down by enabling the thermal shutdown feature. The failure of all the three designed diagnostic tests involving digital ports, UART and PWM channels are observed. It is observed that the failure in the 8-bit microcontroller is through the Vcc and Ground pins when the ESD event was closer to these pins. This may be because of the capacitor across Vcc and Ground discharging into these pins due to the ESD event. For the ESD event at other pins, mostly malfunction was observed. The MSP430 launchPad with 16 bit microcontroller is quite immune to ESD owing to its inbuilt design and ESD considerations. This is confirmed experimentally by performing indirect and direct ESD tests at specified standard voltages. However direct contact discharge of 8kV given to the Tx-Rx pins of the jumper array resulted in the damage of the communication port of the 16 bit microcontroller MSP 430G2231 IC. The microcontroller MSP 430G2231 is found to be not communicating with the software and the program is not executable. The communication port (Rx-Tx pins) needs protection in the form of TVS diodes. The 8 bit microcontroller system configured to do a diagnostic check of its functioning during an ESD event had no extra on-board protection devices other than the on- chip protection. The 8 bit microcontroller did not withstand the IEC recommended up to 15kV air discharge perhaps because it was designed on a two layer PCB board. The MSP 430 launch pad with the 16 bit microcontroller on a four layer PCB was designed keeping in mind the ESD considerations. The 16 bit microcontroller also did not withstand the IEC recommended upto 8kV contact discharge at the communication port perhaps because of lack of extra protection. Continuous discharges on 8 bit microcontroller led to its thermal shutdown. But the continuous discharges on the 16 bit and 32 bit did not result in thermal shutdown perhaps because it was designed on four layer boards. All the observations from the previous tests and conclusions are put to use in the custom designed four layer board with 32 bit microcontroller interfaced with various components like the UART, audio interface, USB, LCD display and key matrix. All the standard design rules for PCB design are followed in the custom designed microcontroller test boards one populated with components having in-built on-chip protection and another board with extra off-chip on-board protection devices. In the custom designed 32 bit microcontroller system on four layer board it is observed that the placement of components on the board and board design played an important role in the systems sturdiness to ESD. The adherence to standard design rules such as split ground and power planes; proper component placement to minimize loop area; power supply decoupling using ferrite beads and decoupling capacitors; placement of connectors, user interfaces and output devices at the edges of the board; separating analog and digital sections has made the microcontroller boards quite rigid against ESD. Also the on-board protection devices at strategic locations such as the input/output, data and power points, communication port and at the input points of the interfaces in the custom designed 32 bit microcontroller system plays a vital role in the robustness of the system. The adherence to standard design rules has made the microcontroller board with components having in-built on-chip protection also quite rigid against ESD. The board with on-chip protection is affected by ESD with problems like malfunction or reset on power on with a damaged LCD interface module. The other board has extra on-board protection devices like ferrite bead used to isolate the noisy digital section from the analog section, decoupling capacitors for power supply decoupling, schottky diode used for ESD protection of USB and TVS diodes used at input points of microcontroller, LCD display, audio amplifier, UART and USB. The board with extra on-board protection devices has only temporary resets and is hardly affected by ESD, and the interface modules are also functioning normally. So experimentally it has been concluded that with adherence to board design and just in-built, on-chip protection the damages are mitigated but malfunctions occur which only recover on hard reset on pow er ON whereas with extra on-board protection devices included, the damages are completely eliminated, malfunctions are reduced and only temporary reset occurs. It can be concluded that not only standard board design rules need to be implemented it is also necessary to provide on-board protection against ESD by choosing appropriate protection devices and placing them at appropriate and strategic locations like the input pins and supply pins of the device. Experiments of direct air discharge are conducted on the insulators in FPGA/CPLD kit like seven segment LED display, LCD and FRC, and contact discharge conducted on the metal points like the switches, pins and the mounting screws. An air discharge of 8 kV on Liquid Crystal Display distorts the data but resets with power ON and an air discharge of 15kV damages the data on the LCD which cannot be restored on reset. An air discharge of 2kV and 4kV had no effect whereas an air discharge of 8 kV and 15 kV distorted the output on seven segment LED display but the display reset to normal with power ON. A contact discharge of 2 kV and 4kV on the HEX keys feeding the data to seven segment display had no effect but a contact discharge of 8 kV shorted the keys which in turn displayed wrong display data. All these devices had only on-chip protection by the manufacturer and these devices needed off-chip, on-board protection devices to make them less susceptible to ESD. Huge transients are observed when air discharge is carried out on the FRC cables connected to the DAC module. When a contact discharge of 2 kV is given on the input pin 187 of the mother baseboard the DAC output voltage reduces. FPGA 3s50 IC is affected during this contact discharge on the input pin. The DAC ICs are affected during the ESD discharge one due to direct ESD effects and the other due to indirect ESD effects. CPLD 9572 IC is also affected by ESD. Because of the ESD discharge in the surrounding and on the input pin of the FPGA/CPLD kit, the ceramic capacitor in the SMPS power supply connected to the kit has shorted and found to be damaged. This is an after-effect observed after the ESD test. The damaged capacitor has been instrumental in contributing to the damage of the FPGA and CPLD ICs. Decapping of the FPGA and CPLD ICs confirmed the failure of these ICs due to ESD. The input/output pin bond pad and the metatop layer of FPGA 3s50 IC is damaged and there is dielectric breakdown observed in CPLD 9572 IC which makes these devices highly susceptible to ESD. Future Scope Much effort has been put into characterizing the effect and impact of ESD on individual ICs, on different designed circuits and few systems such as FPGA/CPLD kit, microcontroller units with various interfaces. However, less time has been spent in modeling all of these circuits/systems and to observe their behavior towards ESD using simulation tools. An effort in mathematical modeling and simulation has however been done with susceptibility of electronic system and cables due to radiated ESD fields. Also circuit modeling has been done for the analog circuits. The experimental based conducted susceptibility tests on various electronic components have resulted in some new results. Some of these results have reiterated some of the known facts and some results have given rise to new thoughts in implementing ESD protected circuit/system. ESD threat level variation to electronic components depends on the discharge voltage of ESD source, discharge point, structure and design of the component. ESD threat to components mounted in systems may significantly vary from the threat to unmounted, individual components. New models need to be designed to predict the condition while the device is working in the system and using the computer simulations it is necessary to predict the ESD voltage, power and energy threats to system-mounted component. This is one area where the experimental results can be compared with the simulated results and the source of the threat, the point of discharge and its impact on the system can be confirmed. Also new protection schemes can be adapted to make the system less susceptible to ESD. Another area of interest where ESD tests can be conducted is in the area of high speed radio frequency (RF) circuits and systems. As the demand for wireless (RF) and high-speed mixed-signal systems continues to increase rapidly, providing sufficient ESD protection for these systems poses a major design and reliability challenge. This is due to the fact that in applying ESD protection to these systems, the protection system must be transparent the protection circuit must not affect the signal under normal operating conditions. A poorly designed protection system can generate impedance mismatches, causing reflections of signals, corruption of signal integrity, and inefficient power transfer between the signal pin and the core circuit. Broadband RF system protection because of ESD parasitic capacitance poses a greater challenge; alternate protection schemes may be necessary. This necessitates us to first understand effect of ESD on these high speed RF systems. However, there is little published information that provides performance analysis of RF circuits with various ESD protection design options scheme, which is attractive for operations in the multi-GHz regime.

Bruce Springsteens Born In The Usa Music Essay

Bruce Springsteens Born In The Usa Music Essay My pod cast is about Bruce Springsteens song Born in the U.S.A. written and performed by himself in 1984. Taken from the album of the same name, it is one of his best-known singles.Magazine Rolling Stone'(ikona) ranked the song 275th on their list of the 500 Greatest Songs of All Time in 2001. It is a verse-chorus song played in 120 bpm for 112 bars in 4/4. Without any modulations the key signature is 5 sharps so we are in B major scale. There are some changes in the form as we going in the middle part of the song, the third chorus is instrumental, verse number 4 has three lines of lyrics and verse number 5 has only 2 lines instead of 4. Harmony rhythm performance According to Springsteen (Ikona), Born In The USA was one of those songs that came out of nowhere and took very little time to record. It was a bit ironic, then, that his biggest hit ever, was one of the most musically simplistic tunes the band ever produced. Born in the USA is revealed with its very first notes, which unveil the two key elements that will drive the entire song: a synthesizer previews the vocal melody of the iconic chorus, while Max Weinbergs (ikona tou) drums lay down a hard-driving, straight-ahead beat. Weinberg said that The percussion work at the outset of the song, might almost be called caveman drumming. A thunder crack snare drum underscores one of the most catchy intros ever with Weinberg simply taking a ferocious whack at the snare drum on beats 2 and 4. About a minute into the track, Weinberg finally kicks in, adding chaotic fills as the song developsà ¢Ã¢â€š ¬Ã‚ ¦Whatever he does he never stops crashing snare hits on 2 and 4 remain the songs steady rhythmic essence right through to the end. The drum solo towards the end of the song was completely improvised. Drummer Max Weinberg said that the band was recording in an oval-shaped studio, with the musicians separated into different parts. Springsteen at the front, suddenly turned towards to him after singing and waved his hands in the air frantically, to signal drumming. Roy Bittans (ikona) synthesizers arent much more subtle than Weinbergs excellent work on the drums. I said, Roy, get this riff!. He just pulled out that sound on the synthesizer . We played it two times and our second take is the record. Springsteen. No matter what else is going on in the song- whether Weinberg is banging away only on the backbeat or filling in the beat, whether the bass and guitars are wailing away or holding quiet, whether Springsteen is singing verses or chorus or nothing at all, Bittans synthesizers are repeating the same five notes, over and over again, Echoing almost exactly the vocal melody of the chorus(ikona 1,2), humming the iconic tune from the songs very first note. (ikona)The combination of Weinbergs drumming and Bittans mesmerizing synth line , made this song so powerful and unforgettable and that is my last point, Born in the USA may be one of the least interesting, or at least, one of the least complex, musical compositions E Street Band ever wrote, but the simple, hard-charging instrumentation provided by Springsteen perfectly matches with his almost screaming vocals with the great meaning of his misunderstood lyrics. . (ikona me to refren) Part 1 kai dio Melody(ikones) Continuing with the melody we can see that it is stable all the time as the vocal line starts and ends every time in the 3rd or the 5th interval of the key both for verses and choruses.(ikones) Second part On the other hand it is noteworthy to have a look in the background and the affects of this song to the listeners. Born In The USA, the title track of Springsteens mega-selling album(ikona), was much misunderstood. Accused at the same time of being repulsively nationalistic, and viciously Anti-American, the track was endorsed by many conservative politicians of the united states and the prime minister, Ronald Reagan(ikona tou), as an exemplar of classic American values whilst the bitter lyrics actually cast a shameful eye on how America treated its Vietnam veterans. Bruce Springsteen received a Kennedy Center Honor on the 7th of December 2009 by the president of the US Barrack Obama who stated: , Im the president, but hes The Boss.(kona) According to Springsteen a lot of people, think at the beginning, that its a rallying call for the flag and the nation and patriotism, and when you start to listen to the message in the song you realize theres another meaning going on in there. (IKONA TOU) Heres a small part of Glen Becks radio network on March 11, 2010, talking about Born in the usa (ixos ikona) Who could imagine that Springsteens trademark song has also been his most misunderstood Springsteen also explained the origin of the title, In 1981 director Paul Schrader (ikona tou) sent me a script called Born in the U.S.AHe wanted me to come up with some music for the film. But the script sat on my writing table until one day I was singing a new song I was writing called Vietnam. I looked over and sang off the top of Pauls cover page, I was born in the U.S.A. Lyrics Ok. Now Lets have a quick thought about the meaning of some lyrics. Born down in a dead mans town The first line of the song is about Bruce springsteens town Long Branch in New Jersey which by the 80s Was one of the dead mans towns, because of the collapse of the industrial economy And the economical depress they were suffering So they put a rifle in my hand Sent me off to a foreign land To go and kill the yellow man Those lines referred to those soldiers who were forced to go to Vietnam and fight for their country without being proud for it. Come back home to the refinery Hiring man says Son if it was up to me Returning to America, the soldiers were spat upon and hated for doing what they were forced to do. Vietnam Veterans Committee in US declares that, Today, one-third of the homeless are Vietnam vets Went down to see my V.A. man He said Son, dont you understand I had a brother at Khe Sahn fighting off the Viet Cong Theyre still there, hes all gone He had a woman he loved in Saigon I got a picture of him in her arms now In those lines we can find the reason why springsteen wrote a song about the Vietnam. Too many people lost their lives, too many people injured for no reason .Khe Sahn was a small village and the site of one of the bloodiest battles of the Vietnam War. VA are the initials for Veterans administration which was the responsible agency for providing healthcare and benefits to ex-soldiers. Down in the shadow of the penitentiary Out by the gas fires of the refinery Im ten years burning down the road Nowhere to run aint got nowhere to go From these lines bruce springsteen wants to pass the message that nobody who has survived the Vietnam war manage to build his live again. Last line sets up a contrast with one of his earlier hits, Born to Run. The album was recorded on analog master tapes, and initially issued on both LP and cassette. The first version of that song was solo acoustic guitar demo at Springsteens home on 3rd of January, 1982 as part of the Nebraska album released later that year. However Springsteens manager and producer Jon Landau couldnt match the lyrics to the music with the rest of Nebraskas material so they decided for a revival of the song in 1982 with the E street band with completely different melody line and musical structure. Despite the fact that Discs previously had been imported from Japan, Born in the U.S.A. became the first compact disc manufactured in the United States by CBS Records in Indiana in September 1984. The album gained additional support from the fact of Springsteen having several singles on the charts at the time. The album spent 84 weeks on the Top 10.

Free Essays - Angela’s Ashes :: Ashes

Informal Essay on Angela’s Ashes   Angela’s Ashes is a moving book full of poverty, suffering, and death that shows that no matter how difficult things seem, the hard tines can always be overcome.   Angela and Malachy McCourt, both Irish, were married in America after a passionate night together that ended up producing their first son, Francis(or Frank as introduced to the reader).   Later, the couple had another son, twins, and a daughter while living in a small apartment in New York.   Margaret soon died and the family moved to Ireland where their lives were only worsened.   Angela had two more children that lived, but the young twins died.   Malachy was an alcoholic who rarely held a job and spent his wages at the pub instead of on his family.   They were forced to beg for food and other necessities because relatives were cruel and selfish.   This novel tells the tell of young Frank having to endure extreme poverty, starvation, and a broken family with strength and courage.   He eventuall y raises enough money to go to America and break free from his depressing childhood.   In my opinion, the theme of this book is that no matter how bad things seem to be, anyone can survive and become successful through perseverance and determination.   For example, Frank grew up in just about the worst environment possible but was determined enough to get himself to America and eventually become the author of a Pulitzer Prize winning novel!   Frank achieved his goals by taking any extra jobs that he could find and saving every penny possible until he could finally afford his passage to America.   Because his father never brought home any money, Frank supported the family with what little wages he earned at his job and was determined to make a good life for himself, his brothers, and his poor mother.   Frank learned to depend upon no one but himself and his determination to succeed won him a new life in America where he now lives happily married.        I noticed numerous literary devices present throughout the book.   One such device is the use of apostrophe.   Apostrophe is used continuously when Frank speaks to the angel on the seventh step and also when he and his parents speak to the dead children such as Eugene, Oliver, and Margaret.   The story is told from the point of view of Frank as he grows from a young boy of about three or four to a young man at nineteen.

World Bank Report & World Development Report Essay example -- essays r

Starting from the year 1990, the international community has set up plans to eliminate poverty in the world by the year 2015 with a set of specific goals to be achieved by that date. These goals were set up according to the studies done beforehand, that showed where and what the major poverty areas and problems in the world were. These studies explained that although the poverty problem was extensive, there were several factors of which the crisis was mainly constituted. The first problem was extreme income poverty, with almost half the world's population living on less than $2 a day, and a fifth living on less than $1 daily. Another major problem was education, which encompassed many aspects. Not only wasn't primary education compulsory in many regions, but there were also problems regarding women getting equal education to men, due to cultural, social and economic barriers. The third main problem area was health, where child mortality rates, for example, were alarming; 'in rich countries fewer than 1 child in 100 does not reach its fifth birthday, while in the poorest countries as many as a fifth of the children do not'. After getting these goals in focus and setting these plans in motion, it was discovered that they weren't going as well as planned. It was found that the goals were pretty unrealistic compared to the conditions and the time period. For example, one of the goals was 'cutting income poverty by half'. This could only be achieved, if income poverty decreased by 2.7% annually between 1990 and 2015, which didn't happen, because studies showed that between 1990 and 1998, it decreased by only 1.7% annually. This failure to achieve the objectives was mainly because of the inequality of the world; inequality in distribution of income, inequality in cultural and religious conditions, inequality in practically too many facets of life to be able to control or conform to a generalized plan. So, from the outcome of this attempt and from going back to the reports of previous decades, a new strategy to eliminate poverty was laid out, based on three fundamental interrelated concepts that could be adapted to each community differently according to its individual conditions. These concepts are promoting opportunity, facilitating empowerment, and enhancing security. In promoting opportunity, the government plays an important role, in making it easy for ... ...le, it says that the governments have to improve their facilities and services, like health, education and infrastructure, so as to give the poor equal opportunities. In the WBR, on the other hand, it says that in needy countries, the World Bank actually finances and funds their infrastructure and educational programs. In the WBR it mentions many different things of this sort, while in the WDR it only clarifies the plan that should be adopted by the countries. Another difference is that in the WBR it is sort of dealing with clients that it wants to please and to better its performance for, and that its plan for reducing poverty, is only part of what it does, in order to reach this goal. The WDR was dealing with the poverty problem only, so I think it sounded more involved in it and more giving in attention to this problem only, using greater detail. I think that for the general public, the WDR is much easier laid out and written, with sufficient background information, plenty of detail and a more humanitarian side of the issue. The WBR is much more disordered, financially oriented, with much greater monetary detail and not much emphasis on the compassionate side of the problem.

Mobile Phone Security

This fact sheet has been developed for the Consumer Education Program by the Communications Commission of Kenya. It was compiled by studying material from various authoritative sources and adopting what Is universally acceptable and relevant to the Kenya situation. The fact sheet is intended to enable Consumers have a good understanding of the issues discussed and hence empower them when making decisions regarding CIT products and services. Introduction One of the biggest threats that a mobile phone user faces today Is loss or theft of the phone.Not only Is the mobile valued as a physical device, the phone may contain personal and financial data stored in the handset or in the phones subscriber identity module (SIMI card). While a stolen SIMI can be barred by a mobile network once the theft has been reported it Is a bit harder to bar the handset from being used with different SIMI card. Unless the user had protected his personal Information with a PIN prior to the theft or loss of th e phone, this data can be accessed by unauthorized persons. Mobile phone users normally store a wide range of information on their phones.This information can either be stored in the phone's Internal or external memory (depending on the make and model of the phone) or In the SIMI card. The SIMI card Is used mainly to store contacts and short messages while the phone's memory is used to store information such as personal photos, emails, and calendar items. In order to prevent unauthorized persons from using the phone and further gaining access to the stored Information, some mobile phones have security features which the user can activate. This fact sheet has been developed to address security of the information stored and what to do should you lose the phone.Securing the information stored. There are at least two methods one can use to secure the Information stored on a mobile phone. These are: a) SIMI lock This method takes advantage of the SIMI card as a storage element to secure private Information associated with the subscriber. The subscriber uses a PIN number which is mostly a four digit code which should only be known to him and is always prompted by the mobile phone every time the SIMI card is inserted into the phone. It Is an effective method since even If the subscriber looses the SIMI card the other person cannot access any information stored on it. Phone lock Mobile phone security This method takes advantage of a password to lock the mobile phone such that access to the phone's functions can only be permitted upon input of the correct password. An eight-digit code is more secure than a four-digit code. Most phones also have an inbuilt an automatic phone lock system which kicks In after a stipulated time period e. G. 30 seconds when activated which Is mostly used as a keypad lock and subscribers are advised to take advantage of this features to enhance the security setting AT tenet phones. N more nana el n a evolves Delve capable AT achieving emails , security especially of corporate email with sensitive internal and external data has become a major concern. This means that mobile handsets hold data which previously only resided in computers. Since this method is more effective and protects more information than the first, subscribers are advised to always lock their phones especially if they hold any sensitive information. Safeguarding your Handset Some of the ways to keep your mobile safe include: ; ; ; Keep your phone safe and out of sight.Only give your number to your friends and people you trust. Avoid using your phone in the street. If you need to call someone in a public place, be discrete and be somewhere where you can see what is happening around you. Use a PIN code to lock your phone. If you're walking alone put your phone on silent or vibrate mode so your ring tone doesn't draw attention to you. Be alert while walking and testing at the same time. Security-mark your phone with a unique code. The best place is underne ath the battery.Many mobile phones are stolen in public places such as cinemas, pubs and nightclubs, especially when they are left on a bar, table or on a seat, so don't leave your phone in such places unattended. Don't leave your phone unattended in a car – if you must, put it out of sight and turn it off or switch to silent mode. It takes seconds for a thief to smash a window and enter a car. For a Bluetooth or Wi-If enabled phone install antivirus software to help guard against harmful programs or viruses. For the sake of the safety of very young children; always keep the phone out of their reach.Avoid making easily identifiable entries in the phone e. G. ‘mum' or ‘dad' for the security of such persons should the phone be lost. There are other methods of securing your phone that are dependent on the genealogy that the phone is based on. The two main technologies used for the provision of mobile services are GSM (Global System for Mobile Communications) and CDMA (Code Division Multiple Access). Phones based on these two technologies connect to their respective networks differently, so the security features differ slightly. Mobile phone security Your GSM Phone's Unique Equipment Identification Number Each GSM mobile phone has a unique electronic serial number called the MIME (International Mobile Equipment Identification) number, which can be identified by the GSM network. It is a 15-digit number programmed into the handset and also written is at the back of the handset, under the battery. On most GSM handsets, it can De Oligopoly on ten managers screen Day pressing ten Key sequence using the keypad, when the phone is switched on.Upon purchase of a mobile handset, users are advised to record their MIME number for use in case the mobile phone is lost or stolen. Your mobile phone service provider can liaise with the police regarding a lost or stolen handset and, if found, your handset will be identified using the MIME. Thieves are deterred fr om stealing mobile phones by MIME blocking. Blocking an MIME on a mobile phone network prevents a GSM mobile phone from being used with any SIMI on any Kenya GSM network. Mobile carriers are able to block the use of customers' lost or stolen mobile phones and unblock recovered mobile phones on their network.They have also agreed to exchange their lists of blocked and unblocked MIME numbers with other mobile carriers so these can also be processed (blocked/unblocked) on all mobile networks. The CDMA phone unique electronic identification number CDMA phones also have a unique electronic identification number, the Electronic Serial Number (SENSE). This number can be found on the back of the CDMA handset under the battery and usually has eight digits, combining letters and numbers. Users are advised tap record this number for identification purposes in case the phone is lost or stolen.Hidden battery power Some mobile phones are designed to reserve battery power. If the cell battery is v ery low and the user is expecting an important call or is confronted by an emergency situation, and doesn't have a charger at that moment, one can activate this reserve battery power. To activate, press the keys *3370#, the cell phone will restart with this serve and the instrument will show a significant increase in battery power. This reserve will get replenished the next time one charges their cell phone.However it should be noted that this only works on some phones. What to do if one's mobile handset is lost or stolen If the user's mobile phone is lost or stolen, the user is advised to contact their mobile phone service provider immediately to suspend service and prevent unauthorized calls being made and billed to the user. If one has a GSM mobile phone, the provider will 3 Mobile phone security block the subscriber's SIMI card and MIME number to prevent heir phone from being used on all Kenya mobile networks.

Financial Accounting Final Answers

ANSWERS 1 a) 1 b) 1 c) 1 d) 1 e) 1 f) This transaction has no effect on the balance sheet since this is only an order, no financial value. 1 g) 1 h) 1 i) 1 j) 2 a) a] b] c] d] e] f] g] h] j] k] l] 2 b) INCOME STATEMENT as of April, 30th Sales Revenue$10,000 COGS $(6,500) GROSS MARGIN $ 3500 Salary Expense $(1,000) Rent Expense $(2,000) Utilities Expense   $(200) Depreciation Expense   $(90)TOTAL EXPENSES $ (3290)Net Income: 3500 – 3290 = $ 210 BALANCE SHEET as of April, 30th Cash 3,870 Acc / Pay 5,000 A/R 10,000 (Raw Mat 11,800 + Finished Goods1,500) Inv 13,300 Total Current Assets $ 27,170 Total Current Liabilities $ 5,000 (Depreciation $90) PPE (Net) $ 5910 C/S $ 30,000 Prepaid Rent $ 2000 R/E $ 80 Total Non-Current Assets $ 7,910 SHE $ 30,080 A = $ 35,080 = L + E = 30,080 + 5,000 = $ 35,080 Age |Amount |Estimate to be Uncollectible |Required balance in Allowance| |1-30 Days |$600,000 |%% 0. 70% |$4,200 | |31-60 Days |$175,000 |% 1. 20% |$2,100 | |61-120 Days |$70,000 |% 11% |$7,700 | |More than 120 Days |$10,000 |% 65% |$6,500 | |Year-end balance of allowance for doubtful accounts  Ã‚  Ã‚  Ã‚   = $20,500 | a) The credit balance in the allowance for uncollectible accounts is $ 2,500 20,500 – 2,500 = 18,000 3 b) In case of skimming the adjusting journal entry, since it would show expense understated; balance sheet equation would be overstated comparing otherwise. The reason to that is removal of this amount would present the company as if it contains higher receivable accounts. 4 a i) Cost of Goods Available for Sale = AFS = InvB + Purchases = = (3,500Ãâ€"66) + (3400Ãâ€"64. 75)+(3,200Ãâ€"64. 30) = $ 656,910COGS (LIFO) = (3,500Ãâ€"66) + (3400Ãâ€"64. 75)+(150Ãâ€"64. 30) = 231,000 + 220,150 + 9,645 COGS (LIFO) = $ 460,795 InvE = AFS – COGS = 656,910 – 460,795 = $ 196,115 = (3050Ãâ€"64. 30) a ii) Cost of Goods Available for Sale = AFS = $ 656,910 COGS (FIFO) = (3,200Ãâ€"64. 30) + (3,400Ãâ€"64. 75)+(450Ãâ€"66) = 205,760 + 220,150 + 29,700 COGS (FIFO) = $ 455,610 InvE = AFS – COGS = 656,910 – 455,610 = $ 201,300 = (3050Ãâ€"66) iii) Cost of Goods Available for Sale = AFS = $ 656,910 Total Units = 3,200 + 3,400 + 3,500 = 10,100 Total Sold Units = 3,600 + 3,450 = 7,050 COGS (FIFO) = (7,050Ãâ€"65. 0405) = COGS (FIFO) = $ 458,536 InvE = AFS – COGS = 656,910  œ 458,536 = $ 198,374 = (3050Ãâ€"65. 0405) 4 b) They are to use LIFO calculation in order to minimize Taxes. The reason for that is in LIFO, which is last in first out method costs of goods are calculated starting from the latest purchases, eventually with higher unit costs. So since the expenses will be shown higher taxes for this period shall be minimized. c) Thomas Engine Company is required to use FIFO method should they choose to report higher profits in March. As per FIFO cost for sold goods are calculated starting from the first received material (earlier inventory mostly as in this example) consequently with lower unit costs will take place in calculations for profits. 5) Original Cost = $ 177,600, Salvage Value= $ 9,600, Assumed Useful Life = 6 years Assumed Total Operating Hours = 30,000 hrs a i) Straight Line Method Average Depreciation Expense = (177,600 – 9,600) / 6 = 28,000 $/per year End of Year |Depreciation Expense ($) |Book Value ($) | |1 |28,000 |149,600 | |2 |28,000 |121,600 | |3 |28,000 |93,600 | ii) SYD Method |EoY |Depreciable Base ($) |Depr. Rate |Depr. Expense ($) |Accumulated Depr. $) |Book Value ($) | |1 |168,000 |6 / 21 |48,000 |48,000 |129,600 | |2 |168,000 |5 / 21 |40,000 |88,000 |89,600 | |3 |168,000 |4 / 21 |32,000 |120,000 |57,600 | a iii) Activity Method |End of Year |Hours Operated |Depr.Expense ($) |Book Value ($) | |1 |4,500 |25,200 |152,400 | |2 |5,000 |28,000 |124,000 | |3 |5,500 |30,800 |93,600 | b) c) As it is S/L Method the Average Depreciation Expense = (177,600 – 9,600)/6 = 28,000 $/per yearAccumulated Depreciation Expense at the end of 3rd year is = 28,000 x 3 = $ 84,000 d) As per SYD Table above Book Value at the end of the 2nd year is $ 89,600. Sold Price = $ 73,000 Loss = 89,600 – 73,000 = $ 16,600 Accordingly; e) As per tables above Book Values at the S/L and Activity Methods are same ($ 93,600) and higher than SYD. The reason of this coencidence is at the end of 3rd year, which is exactly the half of assumed useful life, total operating is (4,500 + 5,000 + 5,500) 15,000 hrs, which is also exactly half of the assumed total operated hours. 6) |Second Year |Second Year w/ loan | |Total Current Assets ($) |36,000 |46,000 | |Total Assets ($) |66,000 |76,000 | |Total Current Liabilities ($) |4,600 |4,600 | |Total Long Term Liabilities ($) |—– |10,000 | |Total SHE ($) |61,400 |61,400 | a) Long Term Debt Ratio= LTD / Total Assets = 0 / 66,000 = 0 b) Debt – Equity Ratio = Total Debt / SHE = 4,600 / 61,400 = 0. 75 c) Current Ratio = Current Assets / Current Liabilities = 36,000 / 4,600 = 7. 82 d) LTD / Total Assets = 10,000 / 76,000 = 0. 13 e) Total Debt / SHE = 14,600 / 61,400 = 0. 24 f) Current Ratio = 46,000 / 4,600 = 10 ———————– DR Cash†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. 100,000 CR C/S†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. 100,000 DR Equipment†¦Ã¢â‚¬ ¦. †¦. 225 CR Acc Payable†¦.. â € ¦ 225 DR Cash†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. †¦. 5,000 † Ã¢â‚¬   †  †  †  †  †  † Ã¢â‚¬  ? † Ã¢â‚¬   †  †  † Ã¢â‚¬   †  †  † Ã¢â‚¬   CR Acc Receivable†¦ 5,000 A = L + E A = L + E DR Prepaid Insu Exp †¦. 3,000 CR Cash†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. 3,000 A = L + E DR Acc Receivable †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. 5,000 CR Sales Rev†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. 5,000 A = L + EDR Prepaid Rent†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. 1,000 CR Cash†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. 1,000 A = L + E DR Land†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. 25,000 CR C/S†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. 25,000 A = L + E DR Equipment†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. 7,500 CR Acc Payable†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. 6,800 CR Cash†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. 700 A = L + E A = L + E DR Acc Payable†¦Ã¢â‚¬ ¦. †¦. 225 CR Check/Cash†¦.. †¦ 225 A = L + E Apr, 1st) DR Cash†¦.. †¦Ã¢â‚¬ ¦. †¦. $ 30,000 CR Common Stock. †¦ $ 30,000 Apr, 2nd ) DR PPE †¦Ã¢â‚¬ ¦. †¦. $ 6,000 CR Cash†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. †¦ $ 6,000 Adjusting Entry on Apr, 30th ) DR Depreciation Exp†¦Ã¢â‚¬ ¦. $ 90 CR Acc Depreciation†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. $ 90 Apr, 4th ) DR Inventory†¦.. †¦Ã¢â‚¬ ¦.. $ 10,000 CR Cash†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. †¦ $ 10,000 Apr, 1st ) DR Prepaid Rent†¦.. †¦$ 4,000 CR Cash†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. †¦ $ 4,000Adjusting Entry on Apr, 30th ) DR Rent Expense†¦Ã¢â‚¬ ¦. $ 2,000 CR Prepaid Rent †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. $ 2,000 Apr, 8th ) DR Work in Progress †¦.. †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. $ 8,000 CR Raw Material in Use†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. †¦ $ 8,000 Apr, 10th ) DR Raw Material †¦.. †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. $ 5,000 CR Acc / Payable†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. †¦ $ 5,000 Apr, 14th ) DR Inventory Expense †¦.. †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. $ 4,000 DR Salary Expense†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦$ 1,000 CR Cash†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. †¦. †¦ $ 5,000 Apr, 15th ) DR Inventory Expense †¦.. †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. $ 800 DR Salary Expense†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦$ 200 CR Cash†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. †¦. †¦ $ 1,000 Apr, 30th ) DR Accounts Receivable†¦Ã¢â‚¬ ¦ †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. 10,000 CR Sales Revenue†¦.. †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. †¦. †¦$ 10,000 Apr, 30th ) DR COGS†¦Ã¢â‚¬ ¦ †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. $ 6,500 CR Inventory. †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. †¦. †¦$ 6,500 Apr, 30th ) DR Dividend†¦Ã¢â‚¬ ¦ †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. †¦.. $ 130 CR Cash†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. †¦. †¦$ 130 DR Bad Debt Expense †¦.. †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. $ 18,000 CR Allowance for Doubt Acc†¦Ã¢â‚¬ ¦. †¦ $ 18,000 Average Unit Cost = =656,910/10,100 = $ 65. 0405 DR Depr Exp †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦$ 28,000 CR Acc Depr†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. $ 28,000 A = L + E DR Depr Exp †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ $ 28,000 Acc Depr†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ $ 28,000 Loss from Asset Disposal†¦Ã¢â‚¬ ¦. $ 16,600 CR Machinery†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. $ 177,600 A = L + E R/EB + N/I = R/EE + Dividend 0 + 210 = R/EE + 130 R/EE = $ 80

Report: Comair Flight

My Summary Comair Flight 191, also marketed and know as Delta Connection Flight 5191, was scheduled to fly from Lexington, Kentucky, to Atlanta, Georgia, on the morning of August 27, 2006. Unfortunately the jet crashed while attempting to take off from Blue Grass Airport in Fayette County, Kentucky. There is a ton of information on this accident and numerous â€Å"mistakes† that possibly led to it but it seems that the majority of the blame was put on the captain. I find this accident had multiple people at fault, in that if any one person was able to do their job professionally and accurately, this accident would not of happened and those people would still be alive today. The Event The aircraft was assigned by the tower to the airport's Runway 22 for the takeoff, but used Runway 26 instead. Runway 26 was too short for a safe takeoff which was typically used for general aviation, causing the aircraft to overrun the end of the runway before it could become airborne. It crashed just past the end of the runway, killing all 47 passengers and two of the three crew. The first officer was the only survivor and not the pilot in command but was flying at the time of the accident. Matthew Kawamura 06/15/2013 Air Trans 1010 SM Errors Leading Some of these errors are of skill based, judgment and or perception based but some are a combination. 1. The flight crew initially boarded the wrong aircraft. A Comair ramp agent noticed that the accident flight crew had boarded the wrong airplane and started its auxiliary power unit. Another company ramp agent notified the flight crewmembers that they had boarded the wrong airplane. The flight crew then shut down the APU and proceeded to the correct airplane. I don’t know if this is a common mistake but shows me how easy the day can start off wrong. That’s 3 professional people that all walked on the wrong plane and did not notice. Should this have set off some alarms that something was not right? My question has no answers but am sure it may have caused them to be behind schedule and then add some sort of stress. 2. The LEX air traffic control tower was staffed with one controller at the time of the accident airplane’s preflight activities, taxi, and attempted takeoff. The controller was responsible for all tower and radar positions. I believe that if the tower did not check on the radar position and follow through on watching the aircraft. He was to make sure the aircraft was on the correct runway. According to the report, the tower was to be manned with two people. If this was enforced, maybe the controller would not have been so over worked and could have caught the mistake. I think also that the controller had assumptions that this crew knew what was going on and didn’t need to be babysat. There had not been any issues with any other aircraft getting on the wrong runway that we know of. 3. The first officer began the takeoff briefing, which is part of the before starting engines checklist. During the briefing, he had confusion as to what runway to use and stated, â€Å"he said what runway†¦ two four,† to which the captain replied, â€Å"it’s two two. † The first officer continued the briefing, which included three additional references to runway 22. This would lead one to believe that there was no more confusion about what runway to use and a second check could have saved them. 4. During the brief, the first officer also noted that the runway end identifier lights were out and commented, â€Å"came in the other night it was like †¦ lights are out all over the place. † This reflects the care of the airport fac ilities. Sounds like a simple task to replace lights but we have no answers to why this is allowed to go on. Having had been to this airport other times, I can see no concern for it as long as you are sure. Just because other planes are doing it doesn’t make it safe. I feel a lot of stuff is follow the leader or a check list mindlessly because that’s how it is and is the same result at the end†¦ Everything the same and ok. This brings in carelessness. Matthew Kawamura 06/15/2013 Air Trans 1010 SM Violations 1. During the start engines checklist, some shady stuff was going on. The captain pointed out that the before starting engines checklist had already been completed, and the first officer questioned, â€Å"We did†? The irst officer seems to be a little behind the curve, the captain is going to fast for him through the checks or just wanted to skipped it completely. Being only a first officer, who is going to argue and is just relying on the captain’s word or not doing checks properly. This also may be standard cheating around the industry. Who will blow the whistle? 2. The flight crew engaged in conversation that was not pertinent to the operation of the flight. This would be violating the sterile cockpit rules during critical moments. Matthew Kawamura 06/15/2013 Air Trans 1010 SM Maybe a sterile cockpit could of helped? Three people messing around sounds like fun but seem to forget about the other people on board who depend on them to be professional. Environmental The crew, tower, weather and plane all seemed to be good to go from the reports. The runway had lighting issues and the charts had some issues. 1. Runway 4/22 had high intensity runway lights that worked and also had centerline lights and runway end identifier lights, but they were out of service at the time of the accident because of a construction project. If more care would of been put in place to how this affects the pilots, and listened to pilot complaints this should not of been an issue. 2. The charts showed the taxiway configuration at the completion of the construction project that was not completed. I couldn’t figure out what all the before and after charts meant, but the bottom line is that the charts in use were out of date and or didn’t show proper information which could have caused more confusion for the crew. Supervision 1. The captain began a discussion with the first officer about which of them should be the flying pilot to ATL. The captain offered the flight to the first officer, and the first officer accepted. Matthew Kawamura 06/15/2013 Air Trans 1010 SM The captain delegated to the first officer and then seemed to rush through the check list and the first officer seemed to not be quite on the ball. The first officer let the captain take control of the check list, this in turn led to inadequate supervision and failure to correct. Organizational influence For the pilots, they seemed to be way relaxed not worried about what was going on around them. This was just another flight even though there was a lot around them going wrong to include the lights and short briefs. Seems that there is no checks to see how people work when no one is watching. For the tower, He seemed relaxed at his job also. He did some presuming and thought he didn’t have to babysit professionals. He saw the Comair airplane make a turn toward what he presumed to be runway 22, which was the last time he observed the airplane. The controller stated that, after he saw the airplane make this turn, he turned away and faced the tower cab’s center console so that he could begin the traffic count. Verbal guidance from the FAA’s vice president of terminal services, stated that facilities with radar and tower responsibilities were to be staffed with two controllers on the midnight shift so that the functions could be split, although both controllers could be colocated in the tower. There seemed to be checks and the tower continued how they wanted. Sounds like there should have been two controllers on duty so this puts people higher in the chain of command at being relaxed and not needing to worry cause it won’t happen to them. The Complete Chain IMO ( In my opinion) 1. I think the first link to the chain of events that led to this crash was when they boarded the wrong plane. This may have put them behind and then started the short cutting of briefs and procedures. Maybe it was just the beginning of their laziness and nothing cloud of have changed it. 2. The charts and lighting situation may have caused more confusion in the cockpit. 3. If the tower had two people, it may have helped out one of the controllers and allowed him the time to watch and make sure they were on the correct runway. The first two points being corrected still may not have prevented this accident but certainly the third would have prevented it unless they just didn’t listen. Solutions 1. Better taxi brief and follow. 2. Use check list and not shortcut. 3. Sterile cockpit. 4. Rest periods modified and day/night shift crews. 5. CRM training 6. Random safety checks 7. Fix lighting and make better 8. Look out the window for cues. Matthew Kawamura 06/15/2013 Air Trans 1010 SM NTSB determination â€Å"The National Transportation Safety Board determines that the probable cause of this accident was the flight crewmembers’ failure to use available cues and aids to identify the airplane’s location on the airport surface during taxi and their failure to cross?check and verify that the airplane was on the correct runway before takeoff. Contributing to the accident were the flight crew’s nonpertinent conversation during taxi, which resulted in a loss of positional awareness, and the Federal Aviation Administration’s failure to require that all runway crossings be authorized only by specific air traffic control clearances. †